Re: use-after-free in __perf_install_in_context

From: Dmitry Vyukov
Date: Tue Dec 08 2015 - 11:51:12 EST

On Tue, Dec 8, 2015 at 5:27 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Fri, Dec 04, 2015 at 09:04:35PM +0100, Dmitry Vyukov wrote:
>> I was able to reproduce it by
>> restricting syscalls only to perf_event_open, perf ioctls and bpf
>> syscall.
> Does that include cpu hotplug?

I have CONFIG_HOTPLUG_CPU enabled. But I don't do actual plug/unplug.

> Sasha just reminded me there is a swevent use-after-free issue on
> hotplug.
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